Specifications

23
Page 45
安捷倫科技高頻元件量測研討會
Feb.23, 2006
Unknown Thru to the Rescue!
Unknown Thru calibration makes
2-port calibrations much easier!
No need for matched or
characterized thru adapters!
Works great for
• Non-insertable calibrations
• Fixed port positions
• Physically looooooooong DUTs
• Port orientations that are not in-line
• Multiport devices
Note: Unknown Thru only
works with guided calibrations
Page 46
安捷倫科技高頻元件量測研討會
Feb.23, 2006
Unknown Thru Algorithm
Unknown thru algorithm uses “TRL” 8-term error model
α
E
DF
E
SF
E
RF
/α
S
11
S
22
S
21
S
12
b
1m
a
1m
b
1
a
1
a
2
b
2
β
E
SR
E
DR
a
2m
b
2m
E
RR
/β
[ A ] [ T ] [ B ]
a
1
b
1
b
2
a
2
a
2m
b
2m
b
1m
a
1m